<template>
	<view>
		<my-search @click="gotoSearch"></my-search>
		<view class="scroll-view-container">
			<!-- 左侧的滚动视图区域 -->
			<scroll-view scroll-y="true" class="left-scroll-view" :style="{height:wh+'px'}">
				<block v-for="(item,i) in cateList" :key="i">
				<view :class="['left-scroll-view-item',i===active?'active':'']" @click="activeChange(i)">
				{{item.cat_name}}</view>
				</block>
			
			</scroll-view>
			<!-- 右侧的滚动区域 -->
			<scroll-view scroll-y="true" class="right-scroll-view" :style="{height:wh+'px'}" :scroll-top="scrollTop">
				<view class="cate-lv2" v-for="(item2,i2) in cateList2" :key="i2">
				<view class="cate-lv2-title">/ {{item2.cat_name}} /</view>
				<!-- 动态渲染三级分类的列表数据 -->
				<view class="cate-lv3-list">
					<!-- 三级分类item项 -->
					<view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
						<!-- 图片 -->
						<image :src="item3.cat_icon.replace('api-ugo-dev','api-ugo-web')"></image>
						<!-- 文本 -->
						<text>{{item3.cat_name}}</text>
					</view>
				</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	import badgeMix from '@/mixins/tabbar-badge.js'
	export default {
		mixins:[badgeMix],
		data() {
			return {
				// 当前设备可用高度
				wh:0,
				// 分类数据列表
				cateList:[],
				// 二级分类列表
				cateList2:[],
				active:0,
				// 滚动条距离顶部的距离
				scrollTop:0
			}
		},
		onLoad() {
			// 窗口大小
			const sysInfo = uni.getSystemInfoSync()
			this.wh = sysInfo.windowHeight - 50
			// 调用获取分类列表数据的方法
			this.getCateList()
		},
		methods: {
			// 获取分类列表的数据
			async getCateList(){
				const {data:res} = await uni.$http.get('/api/public/v1/categories')
				if(res.meta.status!=200) return uni.$showMsg()
				this.cateList = res.message
				// 为二级分类重新赋值
				this.cateList2 = res.message[0].children
			},
			activeChange(i){
				this.active  = i;
				// 为二级分类·列表重新赋值
				this.cateList2 = this.cateList[i].children;
				// 让scrollTop的值在0和1之间切换
				this.scrollTop = this.scrollTop===0?1:0;
			},
			// 点击三级列表分类选项跳转到商品列表的页面
			gotoGoodsList(item3){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid='+item3.cat_id
				})
			},
			// 组件自定义事件
			gotoSearch(){
				// console.log('ojbk')
				uni.navigateTo({
					url:'/subpkg/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
.scroll-view-container{
	display: flex;
	
	.left-scroll-view{
		width: 120px;
		.left-scroll-view-item{
			background-color: #F7F7F7;
			line-height: 60px;
			text-align: center;
			font-size: 12px;
		&.active{
			background-color: #FFFFFF;
			position: relative;
			&::before{
				content: '';
				display: block;
				width: 3px;
				height: 30px;
				background-color: #C00000;
				position: absolute;
				top: 50%;
				left: 0;
				transform: translateY(-50%);
			}
		}
		}
	}
}
// 二级分类
.cate-lv2-title{
	font-size: 12px;
	font-weight: bold;
	text-align: center;
	padding: 15px 0;
}
// 三级分类
.cate-lv3-list{
	display: flex;
	flex-wrap: wrap;
	.cate-lv3-item{
		width: 33.33%;
		display: flex;
		flex-direction: column;
		justify-content: center;
		align-items: center;
		margin-bottom: 10px;
		image{
			width: 60px;
			height: 60px;
		}
		text{
			font-size: 12px;
		}
	}
}
</style>
